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boards: arm: add initial support for Renesas EK-RA4M1
The EK-RA4M1 is a basic development board for the Renesas RA4M1 Microcontroller. The board contains J-Link on board, a user LED and push button and several headers for interfacing with external devices. Signed-off-by: Ian Morris <[email protected]>
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‎boards/renesas/ek_ra4m1/Kconfig.ek_ra4m1‎

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# Copyright (c) 2024 Ian Morris
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_EK_RA4M1
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select SOC_R7FA4M1AB3CFP

‎boards/renesas/ek_ra4m1/board.cmake‎

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# Copyright (c) 2024 Ian Morris
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# SPDX-License-Identifier: Apache-2.0
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board_runner_args(pyocd "--target=r7fa4m1ab")
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include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

‎boards/renesas/ek_ra4m1/board.yml‎

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# Copyright (c) 2024 Ian Morris
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# SPDX-License-Identifier: Apache-2.0
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board:
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name: ek_ra4m1
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vendor: renesas
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socs:
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- name: r7fa4m1ab3cfp

‎boards/renesas/ek_ra4m1/doc/img/renesas_ek_ra4m1.jpg‎

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‎boards/renesas/ek_ra4m1/doc/index.rst‎

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.. _renesas_ek_ra4m1:
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Renesas EK-RA4M1
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################
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Overview
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********
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The Renesas EK-RA4M1 development board contains a Renesas Cortex-M4 based
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R7FA4M1AB3CFP Microcontroller operating at up to 48 MHz with 256 KB of Flash
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memory and 32 KB of SRAM.
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.. figure:: img/renesas_ek_ra4m1.jpg
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:align: center
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:alt: Renesas EK-RA4M1
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EK-RA4M1 (Credit: Courtesy of Renesas Electronics Corporation)
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Hardware
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********
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The EK-RA4M1 board contains two USB connectors, a user LED, a push
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button and a reset button. It has J-Link onboard and two PMOD sockets for
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interfacing with external electronics. For more information about the
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evalutation kit board see the `Renesas EK-RA4M1 website`_.
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Supported Features
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==================
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The Zephyr Renesas EK-RA4M1 configuration supports the following hardware
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features:
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+-----------+------------+-------------------------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+=====================================+
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| NVIC | on-chip | nested vector interrupt controller |
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+-----------+------------+-------------------------------------+
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| UART | on-chip | serial port-polling; |
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| | | serial port-interrupt |
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+-----------+------------+-------------------------------------+
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| PINMUX | on-chip | pinmux |
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+-----------+------------+-------------------------------------+
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| GPIO | on-chip | GPIO output |
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| | | GPIO input |
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+-----------+------------+-------------------------------------+
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Other hardware features have not been enabled yet for this board.
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The default configuration can be found in the defconfig file:
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:zephyr_file:`boards/renesas/ek_ra4m1/ek_ra4m1_defconfig`.
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Programming and debugging
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*************************
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Building & Flashing
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===================
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You can build and flash an application in the usual way (See
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:ref:`build_an_application` and
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:ref:`application_run` for more details).
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Here is an example for building and flashing the :zephyr:code-sample:`blinky` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/basic/blinky
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:board: ek_ra4m1
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:goals: build flash
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Debugging
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=========
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Debugging also can be done in the usual way.
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The following command is debugging the :zephyr:code-sample:`blinky` application.
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Also, see the instructions specific to the debug server that you use.
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.. zephyr-app-commands::
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:zephyr-app: samples/basic/blinky
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:board: ek_ra4m1
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:maybe-skip-config:
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:goals: debug
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References
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**********
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.. target-notes::
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.. _Renesas EK-RA4M1 website: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4m1-evaluation-kit-ra4m1-mcu-group

‎boards/renesas/ek_ra4m1/ek_ra4m1.dts‎

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/*
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* Copyright (c) 2024 Ian Morris
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <renesas/ra/r7fa4m1ab3cfp.dtsi>
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#include <zephyr/dt-bindings/pinctrl/renesas/pinctrl-r7fa4m1xxxxxx.h>
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#include <zephyr/dt-bindings/gpio/gpio.h>
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#include <zephyr/dt-bindings/input/input-event-codes.h>
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/ {
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model = "Renesas EK-RA4M1";
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compatible = "renesas,r7fa4m1ab3cfp";
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chosen {
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zephyr,console = &uart1;
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zephyr,shell-uart = &uart1;
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zephyr,sram = &sram0;
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zephyr,flash = &flash0;
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};
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leds {
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compatible = "gpio-leds";
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ld1: led_1 {
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gpios = <&ioport1 6 GPIO_ACTIVE_HIGH>;
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label = "User LED";
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};
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};
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buttons {
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compatible = "gpio-keys";
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button1: button_1 {
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gpios = <&ioport1 5 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
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label = "User Push Button";
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zephyr,code = <INPUT_KEY_0>;
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};
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};
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aliases {
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led0 = &ld1;
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sw0 = &button1;
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};
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};
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&pinctrl {
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sci1_default: sci1_default {
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group1 {
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pinmux = <P401_TXD1>, <P402_RXD1>;
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};
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};
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};
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&sci1 {
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status = "okay";
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pinctrl-0 = <&sci1_default>;
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pinctrl-names = "default";
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uart1: uart {
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current-speed = <115200>;
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status = "okay";
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};
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};
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&ioport1 {
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status = "okay";
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};
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&fcu {
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status = "okay";
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};
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&mosc {
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status = "okay";
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clock-frequency = <12000000>;
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};
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&cgc {
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clock-source = <&mosc>;
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iclk-div = <1>;
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pclka-div = <1>;
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pclkb-div = <2>;
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pclkc-div = <1>;
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pclkd-div = <1>;
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fclk-div = <2>;
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};

‎boards/renesas/ek_ra4m1/ek_ra4m1.yaml‎

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identifier: ek_ra4m1
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name: Renesas EK-RA4M1
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vendor: renesas
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type: mcu
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arch: arm
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toolchain:
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- zephyr
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- gnuarmemb
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- xtools
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ram: 32
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flash: 256
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supported:
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- gpio
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- uart

‎boards/renesas/ek_ra4m1/ek_ra4m1_defconfig‎

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# Copyright (c) 2024 Ian Morris
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=12000000
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CONFIG_BUILD_OUTPUT_HEX=y
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# enable uart driver
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CONFIG_SERIAL=y
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# enable console
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CONFIG_CONSOLE=y
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CONFIG_UART_CONSOLE=y
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# enable GPIO
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CONFIG_GPIO=y
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# enable pin controller
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CONFIG_PINCTRL=y
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# enable Clocks
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CONFIG_CLOCK_CONTROL=y

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